Found in a 90s Motorola documentation, this circuit makes it a PUT. This component is not very common today. The graph shows the performance of the circuit.
An input pulse produces a damped oscillation at the output of this circuit seen elsewhere on this...
The figure shows how to implement an R-S flip-flop or bistable reset-Set with an LM3900...
Radio Electronics magazine in November 1962 published in an article several circuits with tunnel...